Wear of Composite Resin Restorations in Primary versus Permanent Molar Teeth

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Abstract
The purpose of this investigation was to compare the wear rates of posterior composite resin restorations in primary versus permanent teeth. Based on theories of composite wear in primary molars, as well as on empirical observations, we hypothesized that wear would be greater in permanent tooth restorations. In Part I of the study, quantitative wear data from four different clinical trials (three permanent tooth studies and one primary tooth study) were compared. The same posterior composite restorative material was investigated in each of the four studies.

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